Method for manufacturing moulds suitable for plastic injection

Abstract

The invention relates to a method for manufacturing molds suitable for plastic injection consisting of a CAD geometry. To which parting lines are added, thereby obtaining a negative CAD insert is then converted into an STL file. The negative of the prototype is built in a stereolithographic machine and the refined and polished, the metal being manufactured in cooper or nickel by electrodeposition or galvanoplasty and the resulting cavity in the metal insert being filled with iron founding or the like.

1 . Method for manufacturing moulds suitable for plastic injection, characterized in that it is constituted starting from cad geometry, to which parting lines are added thereby obtaining the inserts which are going to be employed in the mould, the designs being done in three dimensions and once the CAD insert is obtained, a negative insert, also in cad, is built, which is then converted into a STL file for the negative of the prototype to be built in a stereolithographic machine, then the parts created by the stereolithographic machine being refined and polished.  
     
     
         2 . Method for the manufacturing of moulds suitable for plastic injection, in accordance with the first claim, characterized in that the master male parts will be manufactured in photosensitive resin using laser beam.  
     
     
         3 . Method for manufacturing moulds suitable for plastic injection, in accordance with the previous claims, characterized in that the obtaining of the metallic insert in copper or nickel is done by electrodeposition or galvanoplasty, with an artificial metallic thickness in accordance with the time maintained inside the bath.  
     
     
         4 . Method for manufacturing moulds suitable for plastic injection, in accordance with the previous claims, characterized in that the resulting cavity in the metal insert is filled with founding of iron, aluminum, copper, bronze or epoxy resin, a solid insert being obtained, provided with centering drills, then being inserted in the mould holder.